* {
    box-sizing: border-box;
}

body, html {
  font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;

  font-size: 12px;

  height: 100%;
  padding: 0;
  margin: 0;
}

.content,
.content > #canvas {
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: white;
}

.buttons {
  position: fixed;
  bottom: 0;
  left: 15px;
  list-style: none;
}

.buttons .icon {
  font-size: 24px !important;
  text-align: center !important;
  color: #404040;
  width: 32px;
  height: 32px;
}

.buttons .icon:hover {
  color: #005DF7
}

.buttons .icon.hidden {
  display: none;
}

.spinner {
  display: inline-block;
  height: 24px;
  width: 24px;
  margin-bottom: 8px;
  margin-left: 4px;
  border-radius: 50%;
  border: 2px solid gray;
  border-top-color: transparent;
  animation: lai-spinnair 1s linear infinite;
  visibility: hidden;
}

.active {
  visibility: visible;
}

@keyframes lai-spinnair {
  0% {
    transform: rotateZ(0);
  }
  100% {
    transform: rotateZ(360deg);
  }
}